Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff2f0d34fe043bd…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 22:08:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 86873e3c982b7d6141f3e954128b9cea SHA-1: 07feabdd942c5824c13ba8d96dbf49c969e6be1f SHA-256: 1ff2f0d34fe043bd9c1862d2036fff56845f2ac589c69c87cfb2fb5914fe7cfc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-risk heuristic indicating it links to a game hack redirector, specifically targeting users interested in 'Coin Master free spins'. The embedded URL, http://netcdn.tw/app/406889139/coin-master-free-spin-app-reviews-game-hack, is the primary indicator of this lure. While no scripts were explicitly extracted, the nature of the lure and the ML classification suggest the PDF is designed to redirect users to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-free-spin-app-reviews-game-hack PDF link annotation
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-robux-obbys-that-work_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-hack-mega-download_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-robux-geneorater_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/jhow-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-source_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-hack-robux-2021-android-ios-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/gear-me-hack-script-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-how-to-get-welcome-to-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/hacker-de-robux-para-roblox-real_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/robux-and-tix-hack-v-7_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000306b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x306B 22452 bytes
SHA-256: 305eaeda51852a47944412b0c887ed7b9595ef81b43c24955f04b4170960fba2
font_01_sfnt_off000062b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B3 18452 bytes
SHA-256: 4fb3e6b180a488a45a4a6afa62ffd7475f97d3e37eaae5eab2fa9c720cb5f821

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